•Appearance of intracranial hemorrhage on MR depends on the age of the hematoma and the sequence (Tl or T2 weighted).
•As hematoma ages, hemoglobin passes through different forms (oxyhemoglobin à deoxyhemoglobin à methemoglobin) prior to red cell lysis and breakdown into hemosiderin.
Stage
Biochemistry
Location
Property
T1W
T2W
Mnemonic
•Appearance of intracranial hemorrhage on MR depends on the age of the hematoma and the sequence (Tl or T2 weighted).
•As hematoma ages, hemoglobin passes through different forms (oxyhemoglobin à deoxyhemoglobin à methemoglobin) prior to red cell lysis and breakdown into hemosiderin.